From 1 lime, squeeze 1 tablespoon juice. Cut remaining lime into wedges; set aside. Push zucchini to one side of pan. Arrange fish in single layer on other side. Sprinkle fish with lime juice, then 2 tablespoons cilantro and 1/4 teaspoon salt. Roast 8 to 10 minutes or until fish is just opaque throughout.

Meanwhile, wrap tortillas in damp paper towels and place in glass or ceramic pie plate. Microwave on High 1 minute or until warm and pliable.

Break fish into large chunks. Divide fish and zucchini among tortillas. Top with avocado slices and remaining cilantro. Garnish with cilantro sprigs and serve with lime wedges and salsa.

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